Title : 
Frequency response of a nonlinear closed-loop system
         
        
            Author : 
Stein, W. A. ; Thaler, G. J.
         
        
            Author_Institution : 
U. S. Naval Postgraduate School, Monterey, Calif.
         
        
        
        
        
        
        
            Abstract : 
THIS ARTICLE PRESENTS two general concepts which are very valuable in analyzing nonlinear servomechanisms. A graphical procedure is introduced by which the frequency response of a nonlinear closed-loop system can be determined from the describing function. The theory is even valid for the general describing function which is both amplitude and frequency dependent (Fig. 1).
         
        
            Keywords : 
Closed loop systems; Convergence; Ear; Frequency response; Gain; Servomechanisms; Transfer functions;
         
        
        
            Journal_Title : 
Electrical Engineering
         
        
        
        
        
            DOI : 
10.1109/EE.1958.6445254